Here satellite map blurry at zoom 12 - here-api

The satellite images are sharp at zoom 13 and up, fine at zoom 11, but really blurry at zoom 12.
Is there anything I can do to have a better quality?
Note that it's not possible to change the ppi: For carnav scheme, satellite.day and normal.day.custom only normal ppi is accepted.
Here are images from Paris:
Zoom 13: https://1.aerial.maps.ls.hereapi.com/maptile/2.1/maptile/newest/satellite.day/13/4149/2818/512/png8?apiKey=xxx
Zoom 12: https://1.aerial.maps.ls.hereapi.com/maptile/2.1/maptile/newest/satellite.day/12/2074/1409/512/png8?apiKey=xxx
Zoom 11: https://1.aerial.maps.ls.hereapi.com/maptile/2.1/maptile/newest/satellite.day/11/1037/704/512/png8?apiKey=xxx

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